Prime Minister Malcolm Turnbull rejected a rise in the GST on Sunday
Scott Morrison will keep potential changes to the GST alive
SA Premier slammed for his 15% GST proposal
Prime Minister Malcolm Turnbull pushing for GST hike before election
Retailers praise expansion of GST to small online purchases
Survey finds 86% of families are concerned about a rise in GST
Industry groups back Premier's plan, Labor and unions oppose
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